氨酸丰富的重复和蛋白质连接体之间的相互作用的结构基础
1Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas 75235-9050.
Nature
|March 9, 1995
概括
富含白的重复是分子识别的关键蛋白质动机. 它们在核糖核酶抑制剂中看到的独特结构解释了它们在结合其他蛋白质方面的有效性.
科学领域:
- 结构生物学是结构生物学.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 富含白的重复 (LRRs) 是多功能结构图案,参与多种分子识别过程.
- LRRs在信号传导,细胞粘附,DNA修复和RNA处理中发挥作用.
研究的目的:
- 阐明蛋白质-蛋白质相互作用的结构基础,其介导由富含白的重复.
- 为了呈现核糖酶A和核糖酶抑制剂复合物的晶体结构.
主要方法:
- 使用X射线结晶学来确定结构.
- 晶体结构的分辨率为2.5 Å.
主要成果:
- 确定了A核糖酶和核糖酶抑制剂之间的复合物的晶体结构.
- рибо核酶抑制剂,完全由LRRs组成,表现出一个不寻常的非球体结构.
- 相互作用涉及暴露于溶剂的平行β片和LRRs中的形状灵活性.
结论:
- 核糖核酶抑制剂的结构特征突出显示了LRRs在蛋白质结合中的有效性.
- 确定的结构可以作为理解涉及其他含有LRR蛋白的相互作用的模型.
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Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
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